These days he writes Rise Up for Students, an advocacy blog about equity and education in Seattle and Washington, focusing on racial issues and social injustice.

He sees Major League Baseball as a reflection to America’s long reckoning with these issues. He started “Nine Innings” about a decade ago after learning about Moses Fleetwood Walker, one of the first Black men to play in the MLB. His only season was in 1884 and he would be the last Black man to play in the bigs until Jackie Robinson cracked the segregated game in 1947.

Halvorson will mark Jackie Robinson Day, April 15, with a song about the Hall of Famer. An ode to Walker comes out on May 1, the 137th anniversary of his first day in MLB.